Oscar-

Welcome to the site.
You're not mad at all.
Big bore rifles bring great joy to sane and healthy men around the world.
I enjoy them too!

If your interest is simply to have a big bore rifle in the 416-458 range, I recommend the 458WM.
As noted by Con, it's an easy and affordable rifle to shoot.
There is a very large and diverse selection of bullets in .458 diameter, and a bolt rifle chambered in .458 is a very versatile rifle.

I have a very nice, flat shooting 350 grain bullet load that runs at 2450fps with no troubles at all, and I can load it down with much lighter bullets or load it to it's dangerous game potential with 500gr bullets at over 2100fps.

The 416 is a great round, but there are only a few bullet choices, and they are expensive.

Enjoy your big bore rifles!

--Tinker